Set internal default log level to ERROR

Author: istathar

Cargo.lock

@@ -14,6 +14,6 @@ regex = "1.11.1"
 serde = { version = "1.0.209", features = [ "derive" ] }
 tinytemplate = "1.2.1"
 tracing = "0.1.40"
-tracing-subscriber = "0.3.18"
+tracing-subscriber = { version = "0.3.18", features = [ "env-filter" ] }
 
 [build-dependencies]

Cargo.toml

@@ -4,7 +4,7 @@ use owo_colors::OwoColorize;
 use std::io::IsTerminal;
 use std::path::Path;
 use tracing::debug;
-use tracing_subscriber;
+use tracing_subscriber::{self, EnvFilter};
 
 use technique::formatting::*;
 use technique::formatting::{self};
@@ -21,8 +21,12 @@ enum Output {
 fn main() {
     const VERSION: &str = concat!("v", env!("CARGO_PKG_VERSION"));
 
-    // Initialize the tracing subscriber
-    tracing_subscriber::fmt::init();
+    // Initialize the tracing subscriber. This respects the RUST_LOG
+    // environment variable if present, or sets Level::ERROR as a fallback.
+    let filter = EnvFilter::from_default_env();
+    tracing_subscriber::fmt()
+        .with_env_filter(filter)
+        .init();
 
     let matches = Command::new("technique")
         .version(VERSION)